[GRASSLIST:5130] Re: Sound reflection and refraction

[Markus Neteler]

On Sat, Nov 30, 2002 at 08:26:11PM +0000, Miha STAUT wrote:
> Hi all,
> 
> Has anybody ever tried to interpolate sound (==> noise) in a general GIS? I 
> only mean 2D interpolation. I know 2D is a big compromise but it has to be 
> done for my school assignment and at this level I do not intend to use a 3D 
> technique.
> 
> How would you treat the spread of a signal from a source r.cost is not a 
> very good solution because of the refraction (picture the emission and 
> imission points on the opposite sides of a building).
> 
> What about the reflection from objects?
> 
> Ideas and comments are welcome.

Hi,

you may read this paper:

Geomatics WorkBooks No 2 - 2001:

 Biagi L., Brovelli M.A., Scuratti M.
 Enviromental noise modeling within an open source GIS 
 http://geomatica.ing.unico.it/cgi-bin/workbooks.cgi?pag=abs2&ind=2

Cheers

 Markus Neteler